How to combine nodes-editor transparency with uv-mapped textures in Blender Render?
You clipped your first screenshot right where it mattered , seeing your complete node setup would help solve the issue.

Are there any more nodes in your material? Is there anything connected to the Vector socket of your image texture?

If not that is where your problem is. When using node materials and textures you must specify which type of texture coordinates to use in your texture within the node setup, to correctly display it.

Before your image texture node add a new Input > Geometry node, choose one set of UV Coordinates from the pull-down menu and connect the UV socket to the vector input of the image node.